Climate Comfort Score
77/100
Good
NOAA 1991–2020 normals 55°F annual avg Public-domain federal data
San Gregorio, CA Climate
Average temperature, precipitation, and a comfort score, drawn from NOAA NCEI 1991–2020 normals →
- 55°F
- Avg annual temp
- 77/100
- Comfort score
- 30.4"
- Annual precip
- 268d
- Growing season
30-year climate normals from 1 weather station (1991-2020).
The climate verdict for San Gregorio
San Gregorio, California averages 55°F a year and scores 77/100 on the comfort index - good, milder than 72% of U.S. cities.
- 55°F
- average temperature, NOAA 1991-2020 normal
- 77/100
- comfort score, milder than 72% of U.S. cities
- 30.4"
- yearly precipitation total
- 268 days
- growing season, frost-free days
Based on NOAA U.S. Climate Normals (1991–2020) - 30-year averages describing the typical year, not a forecast.
Avg Temperature
55°F (13°C)
Avg High
65°F
Avg Low
45°F
Annual Precip
30.4"
Annual Snow
0.0"
Comfort Score
77/100
Good
Avg Annual Temperature
55°F
30-year mean (NOAA NCEI)
Annual Precipitation
30.4"
Liquid-equivalent total
Comfort score vs national 100-point ceiling (San Gregorio) 77.0%
National median (63)
PlainClimate composite, temperature mildness, humidity, precipitation, extreme-weather frequency. Good for the San Gregorio area.
How San Gregorio compares to every U.S. city
San Gregorio's comfort score vs. all U.S. cities
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
77 Top 28% higher than 72% of 6,915 US cities
Each bar is a band; taller bars hold more US cities. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source NOAA U.S. Climate Normals, PlainClimate comfort index · 1991–2020
Warming context for San Gregorio
MethodologyHow the U.S. land temperature anomaly tracks against the global mean since 1900. The current NOAA 1991-2020 normal for San Gregorio captures average conditions across the spread shown, the most recent decade is warmer than the 30-year mean.
- United States land mean (NOAA NCEI) +0.11 °C/decade
- Global anomaly (NASA GISTEMP) +0.11 °C/decade
- Paris Agreement thresholds 1.5°C / 2.0°C
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Snow | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|---|
| January | 60°F (15°C) | 40°F (5°C) | 50°F (10°C) | 5.8" | 0.0" | 4.5 | 0.0 |
| February | 60°F (16°C) | 41°F (5°C) | 51°F (10°C) | 6.2" | 0.0" | 2.2 | 0.0 |
| March | 61°F (16°C) | 42°F (5°C) | 51°F (11°C) | 4.3" | 0.0" | 1.4 | 0.0 |
| April | 62°F (17°C) | 43°F (6°C) | 53°F (12°C) | 2.3" | 0.0" | 0.4 | 0.0 |
| May | 64°F (18°C) | 46°F (8°C) | 55°F (13°C) | 0.9" | 0.0" | 0.3 | 0.1 |
| June | 67°F (19°C) | 48°F (9°C) | 57°F (14°C) | 0.4" | 0.0" | 0.1 | 0.3 |
| July | 69°F (21°C) | 52°F (11°C) | 61°F (16°C) | 0.1" | 0.0" | 0.0 | 0.2 |
| August | 71°F (21°C) | 52°F (11°C) | 61°F (16°C) | 0.2" | 0.0" | 0.0 | 0.2 |
| September | 72°F (22°C) | 49°F (10°C) | 61°F (16°C) | 0.2" | 0.0" | 0.0 | 0.5 |
| October | 69°F (20°C) | 45°F (7°C) | 57°F (14°C) | 1.3" | 0.0" | 0.1 | 0.6 |
| November | 63°F (17°C) | 41°F (5°C) | 52°F (11°C) | 2.6" | 0.0" | 2.5 | 0.0 |
| December | 59°F (15°C) | 40°F (4°C) | 50°F (10°C) | 6.1" | 0.0" | 4.5 | 0.0 |
Monthly Precipitation
Average monthly rainfall and snowfall
January 5.8"
13.5 days with precipitation
February 6.2"
13.5 days with precipitation
March 4.3"
11.8 days with precipitation
April 2.3"
9.8 days with precipitation
May 0.9"
6.3 days with precipitation
June 0.4"
4.0 days with precipitation
July 0.1"
2.8 days with precipitation
August 0.2"
3.3 days with precipitation
September 0.2"
2.6 days with precipitation
October 1.3"
5.3 days with precipitation
November 2.6"
10.3 days with precipitation
December 6.1"
13.0 days with precipitation
Frost Dates & Growing Season
First Fall Freeze
November 25
50% probability date
Last Spring Freeze
March 2
50% probability date
Growing Season
268 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
3,722
Higher = more heating needed
Cooling Degree Days
23
Higher = more cooling needed
Warmest Month
August
Coldest Month
December
What San Gregorio's climate means for you
San Gregorio runs 55°F a year - peaking in August, coldest in December.
- Gardeners get about 268 frost-free days, with the last spring freeze near March 2 - plan the planting calendar around it, not the regional average.
- Energy bills track 3,722 heating and 23 cooling degree days a year, higher means the furnace or AC runs more.
- Comparing places to live? Line this city up against nearby cities and the national rankings. See rankings
These are 30-year NOAA normals (1991–2020) - the typical year, not a forecast for any specific season.
Climate Guides
Climate Insight: San Gregorio, CA
The NOAA 1991–2020 climate normals describe San Gregorio, California as a location with an annual average temperature of 55°F, ranging from a mean daily high of 65°F to a mean daily low of 45°F. August is typically the warmest month of the year, while December is the coldest. These thirty-year averages, computed from station USC00047807, smooth out year-to-year variability and give a baseline expectation for typical conditions in any given month.
Precipitation patterns matter as much as temperature for anyone planning to live, garden, or travel here. San Gregorio receives roughly 30.4 inches of precipitation each year, with negligible snowfall. The frost-free season averages 268 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near March 2 and the first fall freeze near November 25. For energy use, 3,722 heating degree days and 23 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.
On PlainClimate's composite comfort index, San Gregorio scores 77/100 (Good), a blended measure that weighs temperature mildness, precipitation moderation, and extreme-weather frequency against one another. Use the monthly tables above to plan around specific windows, shoulder seasons for mild highs and lows, peak summer for August-driven heat, or deep winter for December-driven cold. All figures here are thirty-year averages: any single year may run warmer, wetter, drier, or cooler than the normal, so treat them as planning guidance rather than forecasts.
Frequently Asked Questions
What is the average temperature in San Gregorio, CA? ▼
The average annual temperature in San Gregorio, California is 55°F. The warmest month averages 72°F (22°C) and the coldest averages 40°F (4°C).
How much rain does San Gregorio get? ▼
San Gregorio receives 30.4 inches of precipitation annually. Based on NOAA 30-year climate normals (1991-2020).
What is the comfort score for San Gregorio? ▼
San Gregorio has a climate comfort score of 77/100 (Good), milder than 72% of U.S. cities in the PlainClimate database.
When is the growing season in San Gregorio? ▼
San Gregorio has approximately 268 frost-free days per year, with the last spring freeze around March 2 and the first fall freeze around November 25.
How much energy does heating and cooling require in San Gregorio? ▼
San Gregorio has 3,722 heating degree days and 23 cooling degree days annually, a heating-dominated climate. See our <a href="/guides/reading-weather-data/" class="underline hover:text-brand-600">guide to reading weather data</a> for what these figures mean.
Where does this San Gregorio climate data come from? ▼
NOAA U.S. Climate Normals v1.0.1 (1991-2020), from weather station USC00047807 near San Gregorio.
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). Station: USC00047807. For informational purposes only.
Read our methodology - how this data is sourced, computed, and verified.
Related
Data sourced from official public datasets. See our methodology for details. Retrieved and formatted by PlainClimate Editorial
Every figure on PlainClimate is rendered directly from NOAA 1991-2020 U.S. Climate Normals data, no number is typed in by an editor. This page draws directly on NOAA 1991-2020 U.S. Climate Normals data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.